They are harder to find as I am learning that fishermen tend to keep the heads for them selves. However, if you go to a real fish monger (fish market) they might be able to help you.
I was thinking last night ablout all of the different chicken dishes that you could subtitute them into, like enchiladas. They would also be great in a taco as it shreads like string cheese, lol. It has to be the strangest meat I have ever had, but very versitile. And like I said before, it does taste like chicken. There are a ton of recipes online that would be easy to make. Hope you find some and have a little fun with it.